The Role of Coal in Future Power Generation in India: Prospects of Advanced Generation Technologies in a Carbon-Constrained World Coal and Electricity in India Conference Sponsored By: International Energy Agency, Ministry of Coal and Mines & Ministry of Power of the Government of India 22-23 September 2003; New Delhi, India Manoj K. Guha Former Manager, Corporate Technology Development American Electric Power Columbus, Ohio, USA
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The Role of Coal in Future Power Generation in India:
Prospects of Advanced Generation Technologies in a Carbon-Constrained World
Coal and Electricity in India ConferenceSponsored By:
International Energy Agency, Ministry of Coal and Mines & Ministry of Power of the Government of India
22-23 September 2003; New Delhi, India
Manoj K. GuhaFormer Manager, Corporate Technology Development
American Electric PowerColumbus, Ohio, USA
Presentation Outline
• Electrical generation in a carbon constrained world
• Role of coal in sustainable development in a carbon constrained world
• The role of coal gasification in the Hydrogen Economy
India’s Energy Strategy
Vision:
To meet the energy needs of all segments of India’s population in the most efficient and cost-effective manner while ensuring long-term sustainability
Provide Clean and Affordable Energy to All
• Promote the design and establishment of decentralized energy service providers
• Design a basket of differentiated services available at differential prices to empower poorer customers choice
• Re-assign energy subsidy allocations towards the provision of micro-credit
Ensure Security of Energy Supply
• Map all energy resources and develop a databank of technology choices, efficiencies and costs to facilitate evaluation of trade-offs between alternative energy paths
• Investments in energy systems and efficiency improvements
• Adopt uniform pricing principles• De-link social function of subsidy
provision from energy pricing decisions• Institutionalize preparation of information
systems, communication and education programs promoting efficiency
Reduce Adverse Environmental Impacts of
Energy Use
• Accelerate development and market adoption of environmentally friendly technologies
• Strategically exploit opportunities arising out of international agreements and the WTO to meet energy goals
• Establish and stringently enforce appropriate environmental standards
Comparison of Per Capita Energy Consumption
Energy and Electricity Demand and the Indian Economy
Power Generation Capacity
India’s Energy Consumption Pattern
Electricity Capacity Additions: Past and Projected
Comparison of Capacity and Energy Generation (Latest Data, 1997)
28.21003,649.30779.8Total
74.0 (0.4)1.6NA59.512.9All Other Renewables
35.0 (0.1)0.4NA14.32.9Geothermal
~~NA-4.019.3Hydro Electric Pumped Storage
14.3 (2.8)9.8NA358.979.9Conventional Hydro
29.5 (5.2)18.510,320673.799.7Nuclear
153.4Dual-fired
46.4Petroleum 20.9 (5.2)18.510,600673.9
50.2Natural Gas
38.8 (14.5)51.29,9601,873.00315.1Coal
USA
3.06100405.696.35Total
~~NA0.2< 0.25All Non-Hydro Renewables
2.7 (0.5)16.9NA68.421.0Hydro
0.3 (0.06)1.811,8007.42.0Nuclear
6.8 (2.5)81.315,500329.673.1Fossil (coal, gas,
petroleum)
India
% of Total World Generation
% Total Within the Country
Average Heat Rate Btu/kWh
BkWHCapacity
GWFuel and/or Generation
SourceCountry
Generation
Energy Consumption by Sector
Electricity, Transportation & CO2
• Electricity accounts for about 40% of end use energy and 36% of CO2 production in the U.S.
• Transportation accounts for about 37% energy consumption and 33% of CO2 in the U.S.(Carbon emissions in India from these sources do not appear to be that much different from U.S. on percentage basis) (Except for passing comments, I will not cover
transportation sector in my presentation)
Cost of Additional Megawatt of Capacity
Low-Carbon Energy Technologies
• DSM and efficiency improvements are powerful tools, but focus is on technologies for future power plants
• Many low/no-carbon technologies available– Renewables– Natural Gas– Nuclear– Coal
• However, natural gas requires extensive infrastructure and abundant fuel reserves
Nuclear Power: A Zero-Carbon Option
• Many disadvantages, but nuclear offers a plentiful source of zero-carbon electricity
• Technological advances to help address concerns– Safety– Capital costs– Economic competitiveness
Coal: The Foundation of Electric Power
• Coal fuels majority of power generation in U.S. and many developing nations
• High carbon content can be offset by low prices and technological improvements– Near-term
• Advanced Pulverized Coal-Fired (PCF) steam cycles• Fluidized Bed Combustion
– Long-term• Integrated Gasification Combined Cycle (IGCC)• Carbon Capture and Sequestration (based on IGCC)• Co-production of energy, heat, and fuels (“EnergyPlexes”)
Coal-Based Energy Technologies I
Coal-Based Energy Technologies II
Heat Rates ComparisonCoal-Based Technologies - Conventional and Advanced
0
2,000
4,000
6,000
8,000
10,000
12,000
ExistingCapacity
PCF w/FGD Adv. PCFw/FGD
PFBC GCC Adv. PFBC Adv. GCC AG w/FuelCell
Hea
t R
ate,
Btu
/kW
h
PCF w/FGD – Pulverized Coal-fired with Flue Gas DesulfurizationPFBC – Pressurized Fluidized Bed CombustionGCC – Gasification Combined CycleAG w/Fuel Cell – Advanced Gasification with Fuel Cell
10,3
59
9,32
0
8,50
0
8,32
0
7,80
0
6,83
0
6,25
0
5,73
0
Generation Technology40% CO2reduction
H2: The New Champion?…
• The ultimate energy carrier– Most abundant element on earth
– Sources are uniformly distributed
– Clean combustion
• But where will the Hydrogen come from?
Hydrogen Production Today
• Steam methane reforming
• Electrolysis
• Partial oxidation of fossil fuels
Limits to Steam Reforming
• Over 80% of global hydrogen is produced via steam reforming of methane
• CH4 + 2H2O → CO2 + 4H2
• Endothermic reaction, requiring high energy inputs
More Limits to Steam Reforming
• Competing uses for natural gas could drive up prices– Heating
– Power generation
– Industrial processes
– Chemical production
• Natural gas is unevenly distributed
Limits to Electrolysis
• 2H2O → 2H2 + 2O2
• Good for distributed applications
• Opens door for Renewables and Nuclear
• Less efficient than alternatives
• Less cost-effective than alternatives
Coal to Hydrogen
• Coal can contribute to this goal as an integral part of the emerging hydrogen system, because it is:– Abundant – Affordable ($1.10/106 BTU)– Reliable– Domestic– Improveable
Rationale for Coal-based H2
• Coal can, and must, become a leading source of hydrogen– Gasification
• Releases the H2 in coal, unlocks the H2 in water
• Coal + H2O + O2 → Syngas (H2, CO) + CO2 + … ($3.75/106 BTU) provided gasification technology can be commercialized at or below $1,000/kW.
• Syngas can be further processed to generate pure H2
• Key developing countries are coal-rich, with every intent of using it
Steps to Success
• For coal to play a role in the hydrogen economy, we must:– Improve gasification systems
• Hot gas clean-up (particulates, H2S)
• High efficiency gas turbines
– Develop carbon capture techniques
– Create carbon storage options
Normalized Costs of Electricity for Different Technologies*
*Levelized Costs at 65% capacity factor for all technologies, except NGCT, which is at 40%
Breakeven Capital Costs of IGCC using Coal Fuel
Lev
eliz
ed C
ost
of
Ele
ctri
city
($M
WH
)
Breakeven Capital Costs of IGCC using Petroleum Coke
Lev
eliz
ed C
ost
of
Ele
ctri
city
($M
WH
)
Integrated Energy Facility (Trigeneration)
Preliminary Economics of a Trigeneration FacilityAssumptions
– 100,000 barrels crude oil/day facility
– 75% of energy from crude oil goes to produce premium fuel (gasoline, kerosene, aviation fuel)
– Refining of high distillate fuel is 72% efficient
– Remaining 25% of energy from crude oil goes to produce heavy distillate residues and/or petroleum cokes. These could be utilized in an entrained bed gasification process to generate electricity and steam
– Premium Fuel, MGED 3.2
– Chemical Feedstock, GED 200,000
– Electric Power, MW 750
– Max. Load Factor for Electricity 75%
– Effective Energy Utilization 85%
Note: These calculations do not include additional steam that can be generated in addition to what is required to operate the refinery and chemical production plant
B) Revenue• Revenue from Premium Fuel3 $935 mil• Revenue from Chemical Feedstock4 $50 mil• Total Annual Revenue $985 mil• Revenue needed from electricity sales $135 mil
C) Cost of Electricity• Annual required electricity revenue $135 mil• Total annual electricity generation 4.93x106 MWH• Cost of electricity (busbar) $27.3/MWH
Notes: 1. Best estimate as per discussion with oil companies & $1 billion for power plant cost2. Projected from refinery data with 15-year recovery period3. Assumes current price of petroleum fuel (80 cents/gal.)4. Assumes average price of 72 cents/gal
Energy Use vs Energy R&D
• Coal & natural gas R&D funding must increase
Challenges Facing Coal for Future Power Generation
A. Environmental Issues• Proposed legislation of 0.15 lb/MBTU limit on NOX emissions• Proposed PM2.5 legislation that may require additional 60% SO2
removal over CAAA of 1990• Global climate change and CO2 emissions• Volatile organic compounds (VOCs) & air toxics, including Hg
emissions control at the ppb level
B. Infrastructure-related Issues
C. Deregulation/Restructuring Issues:• Will the future market price of electricity be able to absorb these
additional costs? • Can coal-fired generation be competitive in the future under
these scenarios?
Conclusions
• Fossil fuels will remain the dominant energy source in foreseeable future
• Environmental constraints demand cleaner, more efficient utilization
• Near to mid-term answer for coal is gasification
• Coal gasification could accelerate the Hydrogen Economy.
Appendix
Appendix:Power Capacity in the Baseline
Scenario
Appendix: Power Generation in the Baseline Scenario
Appendix: Investment Requirements for Generation
by Scenario
Appendix: Total Discounted Costs, Emissions, and Fuel